The invention provides a packaged drug inspection device and method which can accurately determine whether a packaged drug is correct at a low cost. In an aspect of the invention, it is determined whether the type of drug inserted into a packaging machine is correct, on the basis of the dispensing information of the drug to be packaged and the drug type information of the drug to be inserted into the packaging machine. Number-by-appearance information indicating the number of drugs for each outward appearance which are packaged in each packet is acquired. The image of each drug corresponding to each dose is captured. The number of drugs for each outward appearance which are packaged in each packet is counted on the basis of the captured image of the drugs. It is determined whether the number of drugs for each outward appearance is correct, on the basis of the number-by-appearance information and the counting result of the number-by-appearance counting unit. It is determined whether the occurrence or non-occurrence of a mix-up of the drugs can be determined, on the basis of at least the dispensing information of the drugs to be packaged and the drug type information of the drugs inserted into the packaging machine. It is determined whether the drugs packaged in each packet are correct.
